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3 years ago

Find the sum. (−a^3+4a−3)+(5a^3−a)

Mathematics

1 answer:

aev [14]3 years ago

5 0

Answer:

4a³+3a-3

Step-by-step explanation:

You can solve this by combining like terms. Add the numbers with the correct exponents together.

-a³+5a³

4a-a

Thus, the answer is

4a³+3a-3

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What is the mean absolute deviation?

Lostsunrise [7]

Answer:

0.8 cm

Step-by-step explanation:

The formula for MAD is attached in the picture.

x_i are the values (data)

x bar is the mean

n is the number of numbers (data)

For figuring out MAD, basically, we subtract the mean from each of the values respectively and take the absolute value and SUM for all of the numbers in the data set. Then we divide by n, the number of numbers.

Let's do this:

MAD = $\frac{|2-3|+|2-3|+|2-3|+|2-3|+|3-3|+|3-3|+|3-3|+|4-3|+|4-3|+|5-3|}{10}\\=\frac{1+1+1+1+0+0+0+1+1+2}{10}\\=\frac{8}{10}=0.8$

MAD is 0.8

6 0

2 years ago

How can you simplify this on to an expression

LiRa [457]

Hello :
1/(√6 -1) = (√6 +1)/(√6 -1)(√6 +1) = (√6 +1)/(√6)²-1² ) = (√6 +1)/5

4 0

3 years ago

How do you rationalise this surd?

Ksivusya [100]

$\frac{1 + \sqrt{3} }{ \sqrt{2} } \times \frac{ \sqrt{2} }{ \sqrt{2} } = \frac{ \sqrt{2} + \sqrt{6} }{2}$
here you go

5 0

2 years ago

Read 2 more answers

Find the volume of the prism 1: 29 cubic cm 2: 819 cubic cm 3: 208 cubic cm

Lapatulllka [165]

Answer:

819 cm³

Step-by-step explanation:

Volume of a cuboid = l*b*h

6 0

2 years ago

Which choice is the solution to the inequality below? 2x < 20 O A. x> 10 O B. x< 10 O c. x< 20 O D. x > 20

ehidna [41]

Answer:

2x<20 (divide both sides by 2, same as you would if an = were between them)

x<10 or B

3 0

2 years ago